/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/Facades/CollectionSelectionFacade.h
Add the indices to the FVertexSetInterface::WeightedUnboundGroup
[FSelectionKey](API\Runtime\Chaos\GeometryCollection\Facades\FSelectionFacade\FSelectionKey) AddSelection ( const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & Indices, const [TArray](API\Runtime\Core\Containers\TArray)< float > & Weights, [FName](API\Runtime\Core\UObject\FName) DependencyGroup )